package com.soten.gpsdemo.utils;

import android.content.Context;

import java.io.File;
import java.lang.reflect.Method;

import dalvik.system.DexFile;

/**
 * Author : pgl on 2018/1/17
 * Version : 1.0v
 * Function : 获取系统属性工具类
 */

public class SystemPropertiesProxy {
    /**
     * This class cannot be instantiated
     */
    private SystemPropertiesProxy() {

    }

    /**
     * Get the value for the given key.
     *
     * @return an empty string if the key isn't found
     * @throws IllegalArgumentException if the key exceeds 32 characters
     */
    public static String get(Context context, String key)
            throws IllegalArgumentException {

        String ret = "";
        try {

            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = cl
                    .loadClass("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[1];
            paramTypes[0] = String.class;

            Method get = SystemProperties.getMethod("get", paramTypes);
            // Parameters
            Object[] params = new Object[1];
            params[0] = new String(key);
            ret = (String) get.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
            ret = "";
        }

        return ret;

    }

    /**
     * Get the value for the given key.
     *
     * @return if the key isn't found, return def if it isn't null, or an
     * empty string otherwise
     * @throws IllegalArgumentException if the key exceeds 32 characters
     */
    public static String get(Context context, String key, String def)
            throws IllegalArgumentException {

        String ret = def;

        try {

            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = cl
                    .loadClass("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[2];
            paramTypes[0] = String.class;
            paramTypes[1] = String.class;

            Method get = SystemProperties.getMethod("get", paramTypes);

            // Parameters
            Object[] params = new Object[2];
            params[0] = new String(key);
            params[1] = new String(def);

            ret = (String) get.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
            ret = def;

        }

        return ret;

    }

    /**
     * Get the value for the given key, and return as an integer.
     *
     * @param key the key to lookup
     * @param def a default value to return
     * @return the key parsed as an integer, or def if the key isn't found
     * or cannot be parsed
     * @throws IllegalArgumentException if the key exceeds 32 characters
     */
    public static Integer getInt(Context context, String key, int def)
            throws IllegalArgumentException {

        Integer ret = def;

        try {

            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = cl
                    .loadClass("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[2];
            paramTypes[0] = String.class;
            paramTypes[1] = int.class;

            Method getInt = SystemProperties
                    .getMethod("getInt", paramTypes);

            // Parameters
            Object[] params = new Object[2];
            params[0] = new String(key);
            params[1] = new Integer(def);

            ret = (Integer) getInt.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
            ret = def;

        }

        return ret;

    }

    /**
     * Get the value for the given key, and return as a long.
     *
     * @param key the key to lookup
     * @param def a default value to return
     * @return the key parsed as a long, or def if the key isn't found or
     * cannot be parsed
     * @throws IllegalArgumentException if the key exceeds 32 characters
     */
    public static Long getLong(Context context, String key, long def)
            throws IllegalArgumentException {

        Long ret = def;

        try {

            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = cl
                    .loadClass("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[2];
            paramTypes[0] = String.class;
            paramTypes[1] = long.class;

            Method getLong = SystemProperties.getMethod("getLong",
                    paramTypes);

            // Parameters
            Object[] params = new Object[2];
            params[0] = new String(key);
            params[1] = new Long(def);

            ret = (Long) getLong.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
            ret = def;

        }

        return ret;

    }

    /**
     * Get the value for the given key, returned as a boolean. Values 'n',
     * 'no', '0', 'false' or 'off' are considered false. Values 'y', 'yes',
     * '1', 'true' or 'on' are considered true. (case insensitive). If the
     * key does not exist, or has any other value, then the default result
     * is returned.
     *
     * @param key the key to lookup
     * @param def a default value to return
     * @return the key parsed as a boolean, or def if the key isn't found or
     * is not able to be parsed as a boolean.
     * @throws IllegalArgumentException if the key exceeds 32 characters
     */
    public static Boolean getBoolean(Context context, String key,
                                     boolean def) throws IllegalArgumentException {

        Boolean ret = def;

        try {

            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = cl
                    .loadClass("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[2];
            paramTypes[0] = String.class;
            paramTypes[1] = boolean.class;

            Method getBoolean = SystemProperties.getMethod("getBoolean",
                    paramTypes);

            // Parameters
            Object[] params = new Object[2];
            params[0] = new String(key);
            params[1] = new Boolean(def);

            ret = (Boolean) getBoolean.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
            ret = def;

        }

        return ret;

    }

    /**
     * Set the value for the given key.
     *
     * @throws IllegalArgumentException if the key exceeds 32 characters
     * @throws IllegalArgumentException if the value exceeds 92 characters
     */
    public static void set(Context context, String key, String val)
            throws IllegalArgumentException {

        try {

            @SuppressWarnings("unused")
            DexFile df = new DexFile(new File("/system/app/Settings.apk"));
            @SuppressWarnings("unused")
            ClassLoader cl = context.getClassLoader();
            @SuppressWarnings("rawtypes")
            Class SystemProperties = Class
                    .forName("android.os.SystemProperties");

            // Parameters Types
            @SuppressWarnings("rawtypes")
            Class[] paramTypes = new Class[2];
            paramTypes[0] = String.class;
            paramTypes[1] = String.class;

            Method set = SystemProperties.getMethod("set", paramTypes);

            // Parameters
            Object[] params = new Object[2];
            params[0] = new String(key);
            params[1] = new String(val);

            set.invoke(SystemProperties, params);

        } catch (IllegalArgumentException iAE) {
            throw iAE;
        } catch (Exception e) {
        }

    }
}
